Induction-coil.



W. MEYER.

INDUCTION GOIL.

APPLIOATION HLED 110v. 27, 1908.

1,004,453. Patented Sept. 26, 1911.

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WILLIAM MEYER, OF CHICAGO, ILLINOIS.

INDUCTION-COIL.

Application filed November 27, 1908.

To all whom it may concern:

Be it known that I, WVILLIAM MEYER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Induction-Coils; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in induction coils, and the object in view is the provision of means for utilizing substantially all of the current as distinguished from the wasting of a portion of the current on an idle resistance as heretofore practiced.

A further object of the invention is the obtaining of a substantially continuous unidirectional current in the secondary of maximum volume.

With these and further objects in view which will in part be hereinafter stated and in part become obvious, the invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully set forth and claimed.

In the accompanying drawing,-Figure 1 is a diagrammatic view of an induction coil embodying the features of the present invention. Fig. 2 is a similar view of the same form of coil constructed for accommodating acurrent of higher voltage.

It has been common heretofore in utilizing current from mains supplying say 220 volts or 550 volts to distribute 110 volts through an induction coil and wasting the balance by allowing it to pass through an idle resistance. Thus fifty per cent. of the current has been wasted even in the use of the 220 volt current, and the waste has been of course materially greater with the 550 volt current, and the present invention is designed to utilize the entire current regardless of the voltage.

In carrying out the invention, as illustrated in Fig. 1, the induction coil is provided with a primary 1 for each 110 volts to be utilized, there being as many primaries 1 as there are multiples of 110 volts in the current supply. Fig. 2 discloses exactly the same structure showing five primaries for use with a 550 volt current. I have, however, found that an induction coil having four primaries may be used without lia- Specification of Letters Patent.

trolytic Patented Sept. 26, 1911.

Serial No. 464,686.

bility of damage with a 550 volt current, and a greater number of primaries may be used with a less voltage so that I do not wish to be limited to any exact proportion, but there should be a general or substantial proportion between the number of primaries and the given voltage, the resistance of each primary being taken into consideration with respect to the voltage which it must carry.

The primaries 1 are connected in series and each is provided with its respective rheostat 2 and an independent interrupter 3, each interrupter 3 being preferably of the electrolytic type. The usual secondary 4 is provided for taking off the induced current.

In operation, for the sake of illustration, say a 220 volt current is supplied through lead 5 to the interrupter 3 of one of the primaries 1, and the current flows through the said primary as a pulsating current owing to the action of the interrupter 3 and passes out one of the rheostats 2 through conductor 6 to the second interrupter 3, and thence through conductor 7 to the second primary 1, and thence through conduc tor 8 to the second rheostat 2, and thence to the negative lead 9. As the current is in terrupted in one of the primaries 1, the dropping of the current will produce an inducedimpulse in the secondary 4 and at the same instant the rising current in the other primary will tend to produce an inverse impulse in the secondary 4:, which inverse impulse will be neutralized by a comparatively small fraction of the induced impulse resulting from the dropping of the current in the first-mentioned primary, and then as the current is interrupted and consequently drops in the second-mentioned primary a forward impulse is induced in the secondary which neutralizes the tendency toward an inverse impulse by the rising current in the first primary, and the operation thus continues delivering a maximum substantially continuous uni-directional current from the secondary 4 and representing the full current value of the 220 volts. This action is accomplished by the arrangement of the primary windings and the use of the elecinterrupters, which interrupters cause a proper and automatic regulation of the different makes and breaks in the structurally parallel circuits of the primary windings, and also by the arrangement set forth an impedance in each circuit is obtained which produces a certain lag which in turn prevents the interrupter-s from operating all at the same time, and consequently letting or rather causing the interruptions to follow each other.

The operation of the structure seen in Fig. 2 is exactly the same as'above described, and the structure is a multiplication of the parts seen in Fig. 1 so that the same reference numerals have been employed and the same description will apply, except that a larger multiple of the standard voltage is accommodated, and the increase might go on indefinitely. 110 volts have been taken as the standard voltage, but obviously each primary may be wound to any resistance de sired to make any given voltage a standard, and it is only necessary that the requisite number of primaries be utilized for accommodating any current representing a-multiple or substantially a multiple of the standard voltage.

Obviously the several primaries 1 are wound. in parallel, that is they are structurally parallel as distinguished from differentially wound, said primaries being, of course, connected in series as indicated.

WVhat I claim is,

1. In an induction coil, aplurality of primary windings, a plurality of interrupters, all of said primary windings and interrupters being connected in a single series circuit with a source current, and a single secondary winding in inductive relation with all of said primary windings.

2. In an induction coil, a plurality of primary windings, a plurality of interrupt ers, and a plurality of adjustable induc tances, all of said windings, interrupters and inductances being connected in a single series circuit with a source of current, and a single secondary winding in inductive relation with all of said primary windings.

3. In an induction. coil, a plurality of primary windings and a plurality of interrupters therefor, all of said windings and interrupters being connected in a single series circut wit-h a source of current, said windings and interrupters being alternately arranged in such circuit, and a single secondary winding disposed in inductive relation with all of said primary windings.

In testimony whereof I ailiX my signature in presence of two witnesses.

IVILLIAM MEYER.

Witnesses L R. MEYER, RoB'r. A. ARENs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

